2) An LC circuit is made by attaching a 0.2221 H inductor is connected across a variable capacitor whose capacitance can be varied by turning a knob. a) i ocillates with a period of 8.000 ms? SuF At what angle should the knob be set so that the circuit OµF – 10µF Сарасitance (all numbers 4 sig figs)
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- Assume that the voltage drop across the resistor, ER, is 78 V, that the voltage drop across the inductor, EL, is 104 V, and the circuit has a total impedance, Z, of 20 . The frequency of the AC voltage is 60 Hz. ETITZ20VAPFER78VIRRPEL104VILXLVARsLLAn electrical circuit has a very small resistance so it can be despised. The capacitor on the left was charged up to the voltage of Vo=10 volts and then, at time t=0, the switch S was closed. The capacity of the capacitors are C=60 µF, and the coil inductance is L=0.04 HI) Find the voltage on the left capacitor, at the instant V1=0.001 s.II) Find the voltage in the right capacitor, at the instant t=002 s.1.3 A coaxial cylindrical capacitor is to be designed with an effective length of 10 cm. The capacitor is expected to have a capacitance of 100 pF and to operate at 11 kV, 1000 kHz. Determine the required thickness if the required insulating material is Polytetrafluoroethylene (P.T.F.E.), &r= 2.0, Eb = 250 kV/cm. Allow a factor of safety of 4 and take to = 8.85x10-1² F/m.
- An inductor coil with an inductance of 10 mH is connected in series with a capacitor to form an LC oscillator circuit system. A 2 μF capacitor at time t = 0 stores a potential difference Vc(?=0) = 60 V. Determine the potential difference across the inductor as a function of time, VL(?) and Determine the rate of change of current strength as a function of time flowing in the circuit, ??/??(?).A 20μF capacitor is subjected to a voltage pulse having a duration of 1 s. The pulse is described by the following equations: vc(t)={30t2 V,0≤t≤0.5 s;30(t−1)2 V,0.5 s≤t≤1 s;0elsewhere. Sketch the current pulse that exists in the capacitor during the 1 s interval.Given the capacitance of four capacitors Ca= 30 µF, Cb = 20 µF, Cc = 40 µF and Cd = 10 µF. If Cb and Cc are connected in parallel and the parallel combination is connected in series with Ca and the combination is further connected in parallel with Cd, calculate (a) the equivalent capacitance (b) the voltage across each capacitor if the circuit is supplied by 240 volts DC source (c) the charge on each capacitor.
- All capacitors were initially discharged. at t = 0, S1 is placed at position 1 and S2 is closed. During this phase, it has been determined that Eth and Rth seen by the equivalent capacitor are, respectively, 16 V and 11.0 kΩ. The equivalent capacitor is 1.50 µF. Calculate the time constant for this phase. Enter your answer in ms rounded to 2 decimal places. At t = 15 ms, S1 is placed at position 2 and S2 is kept closed. At t = 25 ms, S1 is kept at position 2 and S2 is opened. Data: R1 = 5 kΩ, R2 = 4 kΩ, R4 = 3 kΩ, R5 = 18 kΩ, R6 = 12.5 kΩ;A series circuit has a capacitor of 1.5625x10^(-8)F a resistor of 2x10^4 ohms, and an inductor of 1H. If the initial charge on the capacitor is zero,. if a 12-volt battery is connected to the circuit and the circuit is closed at t=0, determine the charge on the capacitor at any time tA series L–R–C circuit has a supply input of 5 volts. Given that inductance, L = 5 mH, resistance, R = 75ohm and capacitance, C = 0.2µF, determine (c) the frequency at which the p.d. across the capacitance is a maximum and (d) the value of the maximum voltage across the capacitor. answer: c) 4741 hz, d)10.85volts
- For t < 0, the capacitor in the given figure is completely discharged. Assume that the switch is thrown at t = 0. Let VS = 15 V, R = 200 Ω, L = 20 mH, and C = 0.1 μF.A heart defibrillator is used to resuscitate an accident victim by discharging a capacitor through the trunk of her body. A simplified version of the circuit is shown . (a) What is the time constant if an 8.00-μF capacitor is used and the path resistance through her body is 1.00×103 Ω ? (b) If the initial voltage is 10.0 kV, how long does it take to declineto 5.00×102 V ?All capacitors were initially discharged. at t = 0, S1 is placed at position 1 and S2 is closed. During this phase, it has been determined that Eth and Rth seen by the equivalent capacitor are, respectively, 19 V and 3.5 kΩ. The equivalent capacitor is 1.50µF. Calculate the value of the current iT immediately after the switching occurred. Enter your answer in mA rounded to 2 decimal places. At t = 15 ms, S1 is placed at position 2 and S2 is kept closed. At t = 25 ms, S1 is kept at position 2 and S2 is opened. Data: R1 = 5 kΩ, R2 = 6 kΩ, R4 = 5 kΩ, R5 = 16 kΩ, R6 = 12.5 kΩ;